Akademik Veri Yönetim Sistemi
JOURNAL OF CHEMICAL TECHNOLOGY AND BIOTECHNOLOGY, cilt.79, sa.11, ss.1268-1274, 2004 (SCI-Expanded)
The treatment of a waste-water taken from a cotton textile mill was investigated using an anaerobic/aerobic sequential system during an operational period of 87 days. The process units consisted of an upflow anaerobic sludge blanket (UASB) reactor and a continuous stirred tank reactor (CSTR). Waste-water characterization was performed before feeding the reactor system. Glucose-COD, and azo dyes were added to the textile waste-water for comparative purposes in the final period of operation. The pH values in the effluent of the UASB reactor were suitable for optimal anaerobic treatment in all runs. The biodegradable part of the COD in waste-water was removed effectively, with the anaerobic stage improving the biodegradability of waste-water entering the aerobic stage. The UASB reactor permitted COD and color removals of 9-51% and 46-55%, respectively, at a hydraulic retention time (HRT) of 30h. COD removal efficiencies were between 40 and 85% and color removal efficiencies were 39-81% in normal and artificially-colored waste-waters at a total HRT of 5.75 days in the UASB/CSTR reactor system. Benzidine produced from the cleavage of azo bond in the anaerobic stage was effectively removed in the aerobic stage, and was identified by comparison of its HPLC spectrum with that of an authentic specimen. (C) 2004 Society of Chemical Industry.